(原始内容存档于2020-11-09) (美国英语). Piranhalike teeth and torn fins reveal ancient fish fight. Science | AAAS. 2018-10-18 [2018-10-24]. (原始内容存档于2020-11-09) (英语). Piranhamesodon
send 7,500 troops to fight Boko Haram in Nigeria [失效連結]. Mashable.com, 31 January 2015. The African Union Readies an Army to Fight Boko Haram (页面存档备份,存于互联网档案馆)